Survival stuff

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2w
300BC-200BC- Archimedes invents the screw named after him.
It is one of the first water pumps, a rotating corkscrew that pushed water up a tube. It will transform irrigation & remain in use into the 21st century at many sewage-treatment plants. Atlantic magazine will rank it the 31st greatest breakthrough since the wheel.
Amish Powerless Tools For A World Without Power
The Amish are masters of off-grid living for centuries. Here are some of the powerless tools you should get before the next big blackout: